ML18046A212
| ML18046A212 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 12/03/1980 |
| From: | CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | |
| Shared Package | |
| ML18046A211 | List: |
| References | |
| NUDOCS 8012080464 | |
| Download: ML18046A212 (3) | |
Text
i CONSUMERS' POWER COMPANY Docket 50-255 Request for Change to the Technical Specifications License DPR-20 For the reasons hereinafter set forth, it is requested that the Technical Specifi-cations contained in the Provisional Operating License DPR-20, Docket 50-255, issu-:
ed to Consumers Power Company on October 16, 1972, for the Palisades Plant be changed as described in Section I below:
I.
Change( s)
A.
Add the following to the basis section of Section 3.16:
"g(l) 2400 V Emergency Bus Undervoltage (Loss of Voltage)
Loss of voltage protection is provided for the 2400V
- emergency buses lC and lD by relays 127-1 and 127-2, respectively.
One relay monitors each of the three phases (eg, 127-1, 127-1 and 127-1 and see Palisades Plant P&ID E-fo).
Th~zsetting~zand acceptance criteria are shown in Table 3.16.l.
g(2) 2400 V Startup Bus Undervoltage (Loss of Voltage)
Loss of voltage protection is provided for the 2400V startup buses lC and lD by relays 127-5 and 127-6, respectively.
One relay monitors each of the three phases (eg, 127-5, l27-5, and 127-5 and see Palisades xy xz yz Plant P&ID E-10).
- The settings and acceptance criteria are shown in Table 3.16.l g(3) 2400 V Emergency Bus Undervoltage (Degraded Voltage)
Degraded voltage protection is provided for the 2400V emergency buses lC and lD by relays 127-7 and 127-8, respectively.
One relay monitors each of the three phases (eg, 127-7, 127-7, and 127-7 and see Palisades xy xz yz Plant P&ID E-10).
The settings and acceptance criteria are shown in Table 3.16.l."
B.
Add the following to the basis section of 3.17:
"The 2400V emergency bus loss of voltage,.startup bus source loss of voltage and emergency bus degraded voltage relays provid~ a 3 out of 3 logic as the signal used to initiate load shedding, and to start the diesel generators.
Three out of 3 logic is used because the off-site power source is preferred.
If one channel is removed from service, the remaining channels are placed in 2 out of 2 logic.
All three channels may be bypassed while the diesel gener-ator for that bus is out of service. Undervoltage relays are intended 8012080 4(,'/
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) _
_ 1 2
to protect safety-related electrical equipment from sustained under-vol tage conditions.
There are three single-phase relays per safety bus arranged in 3 out of 3 logic."
C.
Add Item 7 to Table 3.16.l as follows:
7(1) 2400 V Emergency Bus Undervoltage Dropout (127-1, 127-2)
Calibrate Verify
( 2) 2400 V Startup Bus Undervoltage Dropout (127-5, 127-6)
Time (3) 2400 V Emergency Bus Undervoltage Dropout (127-7, 127-8)
Time Delay Pickup D.
Add the following to Table 3.17.4:
"8 9
10 2400 V Emergency Bus Undervoltage 2(f) None (127-1, 127-2) 2400 V Startup Bus Un~ervoltage (127-5, 127-6) 2(f) None 2400 V Emergency Bus Undervoltage 2(f) None (127-7, 127-8)
Footnotes:
89-97V 217-253 CY 327-489 CY 80.75-89.25V 4 Cy or Less 109.2-lll.3V 0.5-0.8 Sec 109.2-114.ov" While Respective
' ( )
D-G is Out of Serviqe*e While Respective
- ( )
D-G is Out of Service e r
I While Respective 1
(
)
D-G is Out of Service e (e)All three channels may be bypassed when the respective diesel generator is out of service.
(f)One relay in each set of three relays (eg, 127-1, 127-1, 127-1) may be inoperable provided its function is i£Y°the t~fpped t5ndition and the remaining two relays are operabJ.e.
One set (eg, 127-1, 127-2,:
etc) may be inoperable during testing."
E.
Add the following to Table 4.1.2:
" 21 2400 V Emergency Bus
- a.
Calibrate R a.
Known Voltage Undervoltage Applied to Relay (127-1, 127-2) 22 2400 V Startup Bus.
- a.
Calibrate R a.
Know-n Voltage Undervoltage
- Applied to Relay (127-5, 127-6/
23 2400 V Emergency Bus
- a.
Calibrate R a.
Known Voltage Undervoltage Applied to Relay" (127-7, 127-8)
F.
Change paragraph 4.7.1.b. to read as follows:
"4.7.l.b A test shall be conducted during each refueling outage to
J'. i.*(
3 demonstrate the overall automatic operation of the emergency power system.
The test shall be. initiated by a simulated simultaneous loss of normal and standby power sources and a simulated SIS signal.
Proper operations shall be verified by bus load shedding and auto-matic starting of selected motors and equipment to establish that restoration with emergency power has been accomplished within 30 seconds.
The system shall operate for five minutes while the gener-ators are loaded with the emergency loads."
II.
Discussion The proposed Technical Specifications changes have been proposed to address the NRC's requirements for undervoltage protection, NRC letter dated June 6, 1979, as well as testing of the diesel generators during load shedding and reconnect sequences.
III.
Conclusion Based on the foregoing, both the Palisades Plant Review Committee and the Safety and Audit Review Board have concluded that these changes do not involve an unreviewed safety question.
CONSUMERS POWER COMPANY B,Ji;, ~ ~-d~) ill,
RB DeWitt, Vice President Nuclear Operations
~and subscribed to before me this 3rd day of December, 1980.
.. -~£~
.-~:**Linda K 'Carstens, Notary Public
- Jackson. County, Michigan MY commissi~~ expires June 10, 1981.
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